CN111525719A - Motor rotor - Google Patents
Motor rotor Download PDFInfo
- Publication number
- CN111525719A CN111525719A CN202010356980.4A CN202010356980A CN111525719A CN 111525719 A CN111525719 A CN 111525719A CN 202010356980 A CN202010356980 A CN 202010356980A CN 111525719 A CN111525719 A CN 111525719A
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- CN
- China
- Prior art keywords
- rotor
- tooth
- pressing plate
- end plate
- plate
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
- H02K3/51—Fastening of winding heads, equalising connectors, or connections thereto applicable to rotors only
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The embodiment of the invention provides a motor rotor, which comprises a rotating shaft, a rotor core, a plurality of guide bars, a first end ring and a second end ring, wherein the middle section of the rotating shaft is a press-fitting part, the rotor core is provided with a connecting hole which is sleeved on the press-fitting part, the first end ring and the second end ring are respectively arranged at two ends of the rotor core, the guide bars penetrate through the rotor core along the axial direction of the rotor core, the rotor core comprises a rotor punching sheet, a first rotor end plate and a second rotor end plate, and the rotor punching sheet is provided with a plurality of first grooves for embedding the guide bars along the circumferential direction of the rotor punching sheet; the first rotor end plate is sleeved on the rotating shaft; the second rotor end plate is established in the pivot, and first rotor end plate and second rotor end plate all include along the axial range upon range of a plurality of rotor end plate towards the piece that sets up of pivot. The motor rotor provided by the invention solves the problems of poor stability, safety and reliability of the rotor when the existing motor runs at high speed and under variable load, and the like, and can avoid the faults of tooth breakage, strip breakage and the like caused by rotor tooth expansion and rotor sheet loosening.
Description
Technical Field
The invention relates to the technical field of electromechanical equipment, in particular to a motor rotor.
Background
In China, high-speed rails have entered into a brisk development stage, a traction motor is used as a core component for electromechanical energy conversion in a mechanical traction transmission system of a high-speed motor train unit, and along with the increasing of the speed per hour and the motor capacity, the industry puts forward higher requirements on the operation safety and the reliability of the traction motor.
When the existing traction motor of the motor train unit operates at high rotating speed and variable load, the rotor often has faults of broken teeth, broken bars and the like under the comprehensive action of high centrifugal force, electromagnetic force, mechanical stress, thermal stress and the like, and the reliability of the motor is seriously influenced, so that the running order of a high-speed rail is influenced.
Disclosure of Invention
The embodiment of the invention provides a motor rotor which can prevent the faults of tooth expansion, tooth breakage and broken bars, thereby ensuring the operation reliability of a motor and ensuring the driving safety.
The embodiment of the invention provides a motor rotor, which comprises a rotating shaft, a rotor core, a plurality of guide bars, a first end ring and a second end ring, wherein the middle section of the rotating shaft is a press-fitting part, the rotor core is provided with a connecting hole, the connecting hole is sleeved on the press-fitting part, the first end ring and the second end ring are respectively arranged at two ends of the rotor core, the plurality of guide bars surround the rotating shaft, the guide bars penetrate through the rotor core along the axial direction of the rotor core, the first ends of the guide bars are fixedly connected with the first end ring, and the second ends of the guide bars are fixedly connected with the second end ring;
the rotor core includes:
the rotor punching sheet is provided with a connecting hole and a plurality of first grooves for embedding the conducting bars along the circumferential direction of the rotor punching sheet;
the first rotor end plate is sleeved on the rotating shaft;
the second rotor end plate, the second rotor end plate cover is established in the pivot, and the rotor punching sheet is located between first rotor end plate and the second rotor end plate, and first rotor end plate and second rotor end plate all include along the axial of pivot a plurality of rotor end plate punching sheets of range upon range of setting, and the rotor end plate punching sheet has a plurality of second recesses that are used for inlaying the conducting bar along rotor end plate punching sheet week.
Optionally, the rotor end plate stamped sheet is stamped from a steel sheet, and the outer diameter of the rotor end plate stamped sheet is smaller than that of the rotor stamped sheet.
Optionally, the second grooves correspond to the first grooves one to one, the shapes of the second grooves are the same as the shapes of the first grooves, and a first tooth portion is formed between every two adjacent second grooves.
Optionally, the rotor core further includes:
the first rotor pressing plate is sleeved on the rotating shaft, a first dovetail groove is formed in one end, away from the rotor punching sheet, of the first rotor pressing plate, a first balancing block is installed in the first dovetail groove, and the first rotor pressing plate and the first rotor end plate are arranged correspondingly;
the second rotor pressing plate is sleeved on the rotating shaft, a second dovetail groove is formed in one end, away from the rotor punching sheet, of the second rotor pressing plate, a second balancing block is installed in the second dovetail groove, and the second rotor pressing plate and the second rotor end plate are arranged correspondingly;
the first rotor tooth pressing plate is provided with a first inner hole, and one end, close to the first rotor end plate, of the first rotor pressing plate is located in the first inner hole;
and the second rotor tooth pressing plate is provided with a second inner hole, and one end, close to the second rotor end plate, of the second rotor pressing plate is positioned in the second inner hole.
Alternatively to this, the first and second parts may,
the first rotor tooth pressing plate is pressed against the first rotor end plate, a first inner hole is formed in the center of the first rotor tooth pressing plate, a plurality of second tooth parts are arranged on the periphery of the first rotor tooth pressing plate, and the second tooth parts are bent towards the first rotor end plate;
the position of the second tooth part when being installed corresponds to the first tooth part;
the second rotor tooth pressing plate is pressed against the second rotor end plate, a second inner hole is formed in the center of the second rotor tooth pressing plate, a plurality of third tooth parts are arranged on the periphery of the second rotor tooth pressing plate, and the third tooth parts are bent towards the second rotor end plate;
the position of the third tooth portion at the time of mounting corresponds to the first tooth portion.
Optionally, a first gap is formed between the first rotor end plate and the first rotor pressing plate, the first rotor tooth pressing plate is located in the first gap, and the thickness of the first rotor tooth pressing plate is greater than the axial gap value of the first gap;
and a second gap is formed between the second rotor end plate and the second rotor pressing plate, the second rotor tooth pressing plate is positioned in the second gap, and the thickness of the second rotor tooth pressing plate is greater than the axial gap value of the second gap.
Alternatively to this, the first and second parts may,
the first tooth parts are distributed at intervals and uniformly, and the second tooth parts are annularly distributed on the periphery of the first rotor tooth pressing plate by taking the axis of the first inner hole as a central line;
the plurality of second tooth parts are distributed at intervals and uniformly, and the plurality of third tooth parts are annularly distributed on the periphery of the second rotor tooth pressing plate by taking the axis of the second inner hole as a central line.
Optionally, the guide bar sequentially penetrates through the first rotor tooth pressing plate, the first rotor end plate, the rotor punching sheet, the second rotor end plate and the second rotor tooth pressing plate along the axial direction of the rotating shaft;
the first end of the conducting bar is inserted into a first slot at one end of the first end ring close to the rotor sheet, and the first end of the conducting bar is fixedly connected with the first slot;
the second end of the conducting bar is inserted into a second slot at one end of the second end ring close to the rotor punching sheet, and the second end of the conducting bar is fixedly connected with the second slot.
Alternatively to this, the first and second parts may,
the guide bar is provided with two first unloading grooves on one side of the guide bar close to the rotating shaft in the radial direction, wherein one first unloading groove corresponds to the positions of the first rotor end plate and the first rotor tooth pressing plate, the other first unloading groove corresponds to the positions of the second rotor end plate and the second rotor tooth pressing plate in the axial direction of the guide bar, the opening of the first unloading groove faces the rotating shaft, and the extending direction of the first unloading groove is parallel to the axis of the rotating shaft;
the guide bar is provided with two second unloading grooves on one side, which is far away from the rotating shaft, of the guide bar in the radial direction, wherein one second unloading groove corresponds to the positions of the first rotor end plate and the first rotor tooth pressing plate, the other second unloading groove corresponds to the positions of the second rotor end plate and the second rotor tooth pressing plate, the opening of the second unloading groove deviates from the rotating shaft, and the extending direction of the second unloading groove is parallel to the axis of the rotating shaft.
Alternatively, the top of the bar is pressed down by a mechanical press to form a depression.
The embodiment of the invention provides a motor rotor, which comprises a rotating shaft, a rotor core, a plurality of guide bars, a first end ring and a second end ring, wherein the middle section of the rotating shaft is a press-fitting part, the rotor core is provided with a connecting hole which is sleeved on the press-fitting part, the first end ring and the second end ring are respectively arranged at two ends of the rotor core, the plurality of guide bars surround the rotating shaft, the guide bars penetrate through the rotor core along the axial direction of the rotor core, the first ends of the guide bars are fixedly connected with the first end ring, and the second ends of the guide bars are fixedly connected with the second end ring; the first rotor end plate is sleeved on the rotating shaft; the second rotor end plate is sleeved on the rotating shaft, the rotor punching sheets are located between the first rotor end plate and the second rotor end plate, the first rotor end plate and the second rotor end plate respectively comprise a plurality of rotor end plate punching sheets which are stacked along the axial direction of the rotating shaft, the rotor end plate punching sheets are provided with a plurality of second grooves used for embedding the guide bars along the circumferential direction of the rotor end plate punching sheets, and the rotating shaft, the rotor iron core, the guide bars, the first end ring and the second end ring are combined to form the motor rotor provided by the embodiment of the invention, so that the high reliability of the motor rotor and the motor is realized, and the problem that the existing rotor is poor in reliability due to tooth expansion and rotor punching sheet loosening, such as tooth breakage, strip breakage and the like is solved.
The construction of the present invention and other objects and advantages thereof will be more apparent from the following description of the preferred embodiments taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a cross-sectional view of a rotor of an electric machine provided in accordance with an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a first rotor end plate in a rotor of an electric machine according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a first rotor tooth pressure plate in a rotor of an electric machine according to an embodiment of the present invention;
fig. 4 is a schematic view of an installation relationship between a conducting bar and a rotor sheet in a motor rotor according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a conducting bar in a rotor of an electric machine according to an embodiment of the present invention.
Description of reference numerals:
1-a rotating shaft;
11-a press-fit part;
2-a rotor core;
21-rotor punching;
211-connection holes;
212-a first groove;
22-a first rotor end plate;
23-a second rotor end plate;
24-a first rotor platen;
241-a first dovetail groove;
25-a second rotor platen;
251-a second dovetail slot;
26-a first rotor tooth press plate;
261-a first inner bore;
262-a second tooth;
27-a second rotor toothed platen;
271-a second bore;
272-a third tooth;
3-a plurality of conducting bars;
31-a recess;
32-a first relief groove;
33-a second relief groove;
4-a first end ring;
41-a first slot;
5-a second end ring;
51-a second slot;
6-punching a rotor end plate;
61-a second groove;
62-a vent;
63-a first tooth;
7-a first gap;
8-a second gap;
9-gullet;
10-a notch;
20-a first weight;
30-second counterweight.
Detailed Description
First, it should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention. And can be adjusted as needed by those skilled in the art to suit particular applications.
Next, it should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "inside", "outside", and the like are based on the direction or positional relationship shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or member must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In high-speed rail and motor train, because the running speed of the high-speed rail and the motor train is high, when the motor runs at high rotating speed and variable load, the rotor often has faults such as broken teeth and broken bars under the comprehensive action of high centrifugal force, electromagnetic force, mechanical stress, thermal stress and the like, and the reliability of the rotor seriously affects the running reliability of the motor, thereby affecting the running order of the high-speed rail.
Therefore, the embodiment of the invention provides the motor rotor, which can prevent the motor rotor from faults such as tooth expansion, tooth breakage, strip breakage and the like.
As shown in fig. 1 to 5, fig. 1 is a cross-sectional view of a rotor of an electric machine according to an embodiment of the present invention. Fig. 2 is a schematic structural diagram of a first rotor end plate or a second rotor end plate in a rotor of an electric machine according to an embodiment of the present invention. Fig. 3 is a schematic structural diagram of a first rotor tooth pressing plate or a second rotor tooth pressing plate in a rotor of an electric machine according to an embodiment of the present invention. Fig. 4 is a schematic view of an installation relationship between a conducting bar and a rotor sheet in a motor rotor according to an embodiment of the present invention. Fig. 5 is a schematic structural diagram of a conducting bar in a rotor of an electric machine according to an embodiment of the present invention.
As shown in fig. 1, this embodiment provides an electric motor rotor, including pivot 1, rotor core 2, many gibs 3, first end ring 4 and second end ring 5, the middle section of pivot 1 is pressure equipment portion 11, rotor core 2 has connecting hole 211, connecting hole 211 cup joints on pressure equipment portion 11, and interference fit between connecting hole 211 and the pressure equipment portion 11, first end ring 4 and second end ring 5 are established at the both ends of rotor core 2 respectively, many gibs 3 encircle pivot 1, gib 3 runs through rotor core 2 along the axial of rotor core 2, and the first end ring 4 fixed connection of gib 3, the second end and the second end ring 5 fixed connection of gib 3.
Specifically, the first end ring 4 and the second end ring 5 have the same structure.
Alternatively, the conductive bars 3 are made of pure copper with low resistivity.
Alternatively, the first end ring 4 and the second end ring 5 are both made of a high-strength copper alloy.
In this embodiment, the rotor core includes a rotor punching sheet 21, a first rotor end plate 22, a second rotor end plate 23, a first rotor pressing plate 24, a second rotor pressing plate 25, a first rotor tooth pressing plate 26, and a second rotor tooth pressing plate 27, the rotor punching sheet 21 has a connection hole 211, the rotor punching sheet 21 has a plurality of first grooves 212 for embedding the guide strips 3 along the circumferential direction of the rotor punching sheet 21, the first rotor end plate 11 is sleeved on the rotation shaft 1, the first rotor end plate 22 is disposed corresponding to the first end ring 4, the second rotor end plate 23 is sleeved on the rotation shaft 1, the rotor punching sheet 21 is located between the first rotor end plate 22 and the second rotor end plate 23, the first rotor pressing plate 24 is sleeved on the rotation shaft 1, one end of the first rotor pressing plate 24 away from the rotor punching sheet 21 is provided with a first dovetail groove 241, a first balancing block 20 is installed in the first dovetail groove 241, and the first rotor pressing plate 25 is disposed corresponding to the first rotor end plate 22, the second rotor pressing plate 25 is sleeved on the rotating shaft 1, one end of the second rotor pressing plate 25, which is far away from the rotor punching sheet 21, is provided with a second dovetail groove 251, a second balancing block 30 is arranged in the second dovetail groove 251, and the second rotor pressing plate 25 and the second rotor end plate 23 are correspondingly arranged, the first rotor tooth pressing plate 26 is provided with a first inner hole 261, one end of the first rotor pressing plate 24 close to the first rotor end plate 22 is positioned in the first inner hole 261, the second rotor tooth pressing plate 27 is provided with a second inner hole 271, one end of the second rotor pressing plate 25 close to the second rotor end plate 23 is positioned in the second inner hole 271, after the rotor punching plate 21, the first rotor end plate 22 and the second rotor end plate 23 are stacked, two ends are respectively and sequentially pressed by the first rotor tooth pressing plate 26, the first rotor pressing plate 24, the second rotor tooth pressing plate 27 and the second rotor pressing plate 25, and then the whole body is sleeved on the rotating shaft 1 in a hot mode and forms interference fit.
Specifically, the first weight 20 and the second weight 30 are used to adjust the unbalance amount of the rotor of the motor provided in the present embodiment.
In the embodiment, the first rotor end plate 22 is used in cooperation with the first rotor tooth pressing plate 26, and the second rotor end plate 23 is used in cooperation with the second rotor tooth pressing plate 27, so that the strength of the rotor tooth part is ensured, and meanwhile, the rigidity of the whole rotor core 2 is enhanced by pressing the rotor punching sheet 21, so that the rigidity of the motor rotor provided by the embodiment is enhanced, and the tooth expansion phenomenon of the motor rotor under the action of thermal stress can be prevented; the phenomenon of tooth breakage caused by looseness due to insufficient pressing force of the tooth part of the rotor punching sheet 21 is avoided.
Specifically, the conducting bars 3 penetrate through the rotor punching sheet 21, the first rotor end plate 22, the second rotor end plate 23, the first rotor pressing plate 24 and the second rotor pressing plate 25 along the axial direction of the rotating shaft 1.
Specifically, the first end of the conducting bar 3 is inserted into the first slot 41 at the end of the first end ring 4 close to the rotor sheet 21, the first end of the conducting bar 3 is fixedly connected with the first slot 41, the second end of the conducting bar 3 is inserted into the second slot 51 at the end of the second end ring 5 close to the rotor sheet 21, and the second end of the conducting bar 3 is fixedly connected with the second slot 51.
Optionally, the first end of the conducting bar 3 is connected to the first slot 41 by welding, and the second end of the conducting bar 3 is connected to the second slot 51 by welding, so that the conducting bar 3 is reliably connected to the first end ring 4 and the second end ring 5.
Specifically, the conducting bars 3 and the first end ring 4, and the conducting bars 3 and the second end ring 5 are connected together by welding, so as to form a current loop.
Optionally, in order to obtain good welding quality and electrical conductivity, the conducting bars 3 are connected with the first end ring 4 and the second end ring 5 by brazing.
Specifically, the first rotor end plate 22 and the second rotor end plate 23 have the same structure, and the first rotor tooth pressing plate 26 and the second rotor tooth pressing plate 27 have the same structure.
In this embodiment, the first rotor end plate 22 and the second rotor end plate 23 both include a plurality of rotor end plate laminations 6 stacked in the axial direction of the rotating shaft 1, and the rotor end plate laminations 6 have a plurality of second grooves 61 for embedding the conducting bars 3 in the circumferential direction of the rotor end plate laminations 6.
In the specific implementation manner of this embodiment, the plurality of rotor end plate stamped sheets 6 are fixedly connected together by bonding or welding to form the first rotor end plate 22 and the second rotor end plate 23, and the first rotor end plate 22 and the second rotor end plate 23 provided by this embodiment have good structural integrity and high tooth rigidity, and can effectively prevent tooth expansion caused by thermal stress.
It should be noted that the connection manner between the multiple rotor end plate laminations 6 is not limited to bonding or welding, and the purpose of this embodiment can be achieved by the connection manner that the multiple rotor end plate laminations 6 can be reliably and firmly connected together, and further description of other connection manners is omitted here.
Specifically, the second grooves 61 correspond to the first grooves 212 one to one, and the shapes of the second grooves 61 are the same as the shapes of the first grooves 212, so that the conducting bars 3 are conveniently embedded on the rotor sheet 21. Specifically, the second groove 61 is the same size as the first groove 212.
As shown in fig. 2, the rotor end plate stamped piece 6 may further have a plurality of ventilation holes 62 along its circumferential direction, and a plurality of second grooves 61 surrounds the outside of the plurality of ventilation holes 62.
Alternatively, the plurality of ventilation holes 62 are evenly distributed on the rotor end plate lamination 6.
Specifically, the number of the vent holes 62 is consistent with the number of the vent holes on the rotor sheet 21, the diameter of the vent holes 62 is larger than that of the vent holes on the rotor sheet 21, and the arrangement of the vent holes 62 can ensure that the motor rotor provided by the embodiment has good ventilation and heat dissipation performance.
Optionally, the second grooves 61 are uniformly distributed on the periphery of the rotor end plate stamped piece 6 at intervals, and the second grooves 61 are used for embedding the conducting bars 3.
In the present embodiment, a first tooth 63 is formed between two adjacent second grooves 61.
Optionally, the rotor end plate stamped steel 6 is stamped by a steel sheet, and the outer diameter of the rotor end plate stamped steel 6 is smaller than the outer diameter of the rotor stamped steel 21.
Specifically, the rotor end plate punching sheet 6 is punched by a steel sheet with the thickness range of 0.5 mm-1 mm, and the outer diameter of the rotor end plate punching sheet 6 is 0.4 mm-1 mm smaller than the outer diameter of the rotor punching sheet 21.
Optionally, a first gap 7 is formed between the first rotor end plate 22 and the first rotor pressing plate 24, the first rotor tooth pressing plate 26 is located in the first gap 7, the thickness of the first rotor tooth pressing plate 26 is greater than the axial gap value of the first gap 7, a second gap 8 is formed between the second rotor end plate 23 and the second rotor pressing plate 25, the second rotor tooth pressing plate 27 is located in the second gap 8, and the thickness of the second rotor tooth pressing plate 27 is greater than the axial gap value of the second gap 8, so that the first rotor end plate 22 and the first end of the rotor sheet 21 are firmly pressed by the first rotor pressing plate 24, and the second rotor end plate 23 and the second end of the rotor sheet 21 are firmly pressed by the second rotor pressing plate 25, and thus the motor rotor provided by this embodiment is compact in structure, the structure of the motor rotor is optimized, and the reliability of the motor is improved.
Optionally, the axial thickness of the first rotor tooth pressing plate 26 is greater than the axial gap value of the first gap 7 by the thickness of the rotor end plate stamped sheet 6, and the axial thickness of the second rotor tooth pressing plate 27 is greater than the axial gap value of the second gap 8 by the thickness of the rotor end plate stamped sheet 6.
Optionally, the first rotor tooth pressing plate 26 presses against the first rotor end plate 22, a central portion of the first rotor tooth pressing plate 26 is provided with a first inner hole 261, a plurality of second tooth portions 262 are arranged on the outer periphery of the first rotor tooth pressing plate 26, the second tooth portions 262 are uniformly bent in a direction of the first rotor end plate 22 at a set angle, during installation, the second tooth portions 262 correspond to the first tooth portions 63, the second rotor tooth pressing plate 27 presses against the second rotor end plate 23, a central portion of the second rotor tooth pressing plate 27 is provided with a second inner hole 271, a plurality of third tooth portions 272 are arranged on the outer periphery of the second rotor tooth pressing plate 27, the third tooth portions 272 are uniformly bent in a direction of the second rotor end plate 23 at a set angle, and during installation, the third tooth portions 272 correspond to the first tooth portions 63.
When the rotor provided by the embodiment is assembled, the second tooth portion 262 and the third tooth portion 272 are sprung outwards, so that the pressing acting force of the first rotor tooth pressing plate 26 on the first rotor end plate 22 is increased, and the pressing acting force of the second rotor tooth pressing plate 27 on the second rotor end plate 23 is increased, so that the rotor punching plate 21 is prevented from loosening when the motor rotor runs at a high speed, the tooth breaking fault caused by the pulse vibration of the guide bars 3 on the tooth portion of the rotor punching plate 21 under the action of the electromagnetic force load is prevented, and the reliability of the motor is improved.
Optionally, the plurality of second tooth portions 262 are distributed at intervals and uniformly, the plurality of second tooth portions 262 are annularly distributed on the outer periphery of the first rotor tooth pressing plate 26 by taking the axis of the first inner hole 261 as a center line, the plurality of third tooth portions 272 are distributed at intervals and uniformly, and the plurality of third tooth portions 272 are annularly distributed on the outer periphery of the second rotor tooth pressing plate 27 by taking the axis of the second inner hole 271 as a center line.
As shown in fig. 3, a slot 9 is formed between adjacent second tooth 262 or third tooth 272, and the slot 9 is used for embedding a conducting bar.
In the present embodiment, the slot bottom of slot 9 extends toward the center of first rotor tooth pressing plate 26 or second rotor tooth pressing plate 27, and the slot bottom of slot 9 is recessed toward the center of first rotor tooth pressing plate 26 or second rotor tooth pressing plate 27, and the opening width of slot 9 is greater than the slot bottom width of slot 9.
Optionally, a plurality of notches 10 are formed on the peripheral side of the first inner hole 261 or the second inner hole 271, the notches 10 are recessed toward the outer peripheral direction of the first rotor tooth pressing plate 26 or the second rotor tooth pressing plate 27, the notches 10 and the ventilation holes 62 are correspondingly arranged and are communicated with each other, the first rotor pressing plate 24 and the first rotor tooth pressing plate 26 are assembled in a clearance fit manner through the first inner hole 261, and the second rotor pressing plate 25 and the second rotor tooth pressing plate 27 are assembled in a clearance fit manner through the second inner hole 271.
In the present embodiment, the plurality of notches 10 are spaced and uniformly distributed around the inner hole of the first inner hole 261 or the second inner hole 271.
As shown in fig. 3, the top of the conductive bar 3 is pressed downward by a mechanical press to form a recess 31.
Specifically, when conducting machinery rises after conducting bar 3 inserts rotor punching 21, owing to form depressed part 31, through the deformation of conducting bar 3, the clearance of conducting bar 3 and the first recess 212 of rotor punching 21 has been eliminated, the area of contact of the first recess 212 of increase conducting bar 3 and rotor punching 21, and then the frictional force between the first recess 212 of conducting bar 3 and rotor punching 21 has been increased, thereby the stability of complex between iron core and the conducting bar has been strengthened, the natural frequency of rotor has been improved, thereby the reliability of the structure of the electric motor rotor that this embodiment provided has been promoted, consequently, the performance of motor has been improved.
Optionally, the guide bar 3 has two first relief grooves 32 on one side close to the rotating shaft 1 in the radial direction, wherein one first relief groove 32 corresponds to the positions of the first rotor end plate 22 and the first rotor tooth pressing plate 26, the other first relief groove 32 corresponds to the positions of the second rotor end plate 23 and the second rotor tooth pressing plate 27 in the axial direction of the guide bar 3, the opening of the first relief groove 32 faces the rotating shaft, the extending direction of the first relief groove 32 is parallel to the axis of the rotating shaft 1, the guide bar 3 has two second relief grooves 33 on one side far away from the rotating shaft 1 in the radial direction, wherein one second relief groove 33 corresponds to the positions of the first rotor end plate 22 and the first rotor tooth pressing plate 26 in the axial direction of the guide bar 3, the other second relief groove 33 corresponds to the positions of the second rotor end plate 23 and the second rotor tooth pressing plate 27, and the opening of the second relief groove 33 faces away from the rotating shaft, and the extending direction of the second unloading groove 33 is parallel to the axis of the rotating shaft 1, and the first unloading groove 32 and the second unloading groove 33 are processed on the conducting bar 3, so that the situation that when the motor runs at a high speed, the conducting bar 3 is in contact with a tooth part positioned on the periphery of the first rotor end plate 22 or the second rotor end plate 23 under centrifugal load, high stress concentration is generated, and tooth breakage or bar breakage occurs can be avoided, further, the service life of the motor rotor provided by the embodiment is prolonged, and the service life of the motor is further prolonged.
In the present embodiment, the groove bottoms of the first unloading groove 32 and the second unloading groove 33 are arc-shaped surfaces, the tops of the arc-shaped surfaces extend into the guide bar 3, the opening width of the first unloading groove 32 is greater than the groove bottom width of the first unloading groove 32, and the opening width of the second unloading groove 33 is greater than the groove bottom width of the second unloading groove 33.
The motor rotor provided by this embodiment includes a rotating shaft 1, a rotor core 2, a plurality of conducting bars 3, a first end ring 4 and a second end ring 5, the middle section of the rotating shaft 1 is a press-fitting portion 11, the rotor core 2 has a connecting hole 211, the connecting hole 211 is sleeved on the press-fitting portion 11, and the connecting hole 211 and the press-fitting portion 11 are in interference fit, the first end ring 4 and the second end ring 5 are respectively disposed at two ends of the rotor core 2, the plurality of conducting bars 3 surround the rotating shaft 1, the conducting bars 3 penetrate through the rotor core 2 along the axial direction of the rotor core 2, and the first end of the conducting bars 3 is fixedly connected with the first end ring 4, the second end of the conducting bars 3 is fixedly connected with the second end ring 5, wherein the rotor core includes a rotor punching sheet 21, a first rotor end plate 22, a second rotor end plate 23, a first rotor pressing plate 24, a second rotor pressing plate 25, a first rotor tooth pressing plate 26 and a second rotor tooth pressing plate 27, the rotor punching sheet 21 is provided with a plurality of first grooves 212 for embedding the guide bars 3 along the circumferential direction of the rotor punching sheet 21, a first rotor end plate 11 is sleeved on the rotating shaft 1, a first rotor end plate 22 is arranged corresponding to the first end ring 4, a second rotor end plate 23 is sleeved on the rotating shaft 1, the rotor punching sheet 21 is positioned between the first rotor end plate 22 and the second rotor end plate 23, a first rotor pressing plate 24 is sleeved on the rotating shaft 1, one end of the first rotor pressing plate 24, far away from the rotor punching sheet 21, is provided with a first dovetail groove 241, a first balancing block 20 is arranged in the first dovetail groove 241, a first rotor pressing plate 25 is arranged corresponding to the first rotor end plate 22, a second rotor pressing plate 25 is sleeved on the rotating shaft 1, one end of the second rotor pressing plate 25, far away from the rotor punching sheet 21, is provided with a second dovetail groove 251, a second balancing block 30 is arranged in the second dovetail groove 251, and the second rotor pressing plate 25 is arranged corresponding to the, the first rotor tooth pressing plate 26 has a first inner hole 261, one end of the first rotor pressing plate 24 close to the first rotor end plate 22 is located in the first inner hole 261, the second rotor tooth pressing plate 27 has a second inner hole 271, one end of the second rotor pressing plate 25 close to the second rotor end plate 23 is located in the second inner hole 271, after the rotor punching sheet 21, the first rotor end plate 22 and the second rotor end plate 23 are stacked, two ends are respectively and sequentially pressed by the first rotor tooth pressing plate 26, the first rotor pressing plate 24, the second rotor tooth pressing plate 27 and the second rotor pressing plate 25, the whole body is sleeved on the rotating shaft 1 in a heat mode and forms interference fit, therefore, under the combined action of the rotating shaft 1, the rotor core 2, the guide bars 3, the first end ring 4 and the second end ring 5, the structure of the motor rotor provided by the embodiment is more stable, phenomena of tooth breaking, bar breaking and the like can be prevented from occurring under the condition that the motor rotor runs at high speed, thereby improving the reliability of the motor.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A motor rotor is characterized by comprising a rotating shaft, a rotor core, a plurality of guide bars, a first end ring and a second end ring, wherein the middle section of the rotating shaft is a press-mounting part, the rotor core is provided with a connecting hole which is sleeved on the press-mounting part, the first end ring and the second end ring are respectively arranged at two ends of the rotor core, the plurality of guide bars surround the rotating shaft, the guide bars penetrate through the rotor core along the axial direction of the rotor core, the first ends of the guide bars are fixedly connected with the first end ring, and the second ends of the guide bars are fixedly connected with the second end ring;
the rotor core includes:
the rotor punching sheet is provided with the connecting hole, and the rotor punching sheet is provided with a plurality of first grooves for embedding the guide bars along the circumferential direction of the rotor punching sheet;
the first rotor end plate is sleeved on the rotating shaft;
the second rotor end plate, the second rotor end plate cover is established in the pivot, the rotor punching sheet is located first rotor end plate with between the second rotor end plate, first rotor end plate with the second rotor end plate all includes the edge a plurality of rotor end plate punching sheets of the axial range upon range of setting of pivot, just the rotor end plate punching sheet is followed rotor end plate punching sheet has a plurality ofly to be used for inlaying in week the second recess of conducting bar.
2. The electric machine rotor of claim 1, wherein the rotor end plate laminations are stamped from sheet steel, and the outer diameter of the rotor end plate laminations is less than the outer diameter of the rotor laminations.
3. The motor rotor as claimed in claim 1 or 2, wherein the second grooves correspond to the first grooves one to one, the shapes of the second grooves are the same as the shapes of the first grooves, and a first tooth portion is formed between two adjacent second grooves.
4. The electric machine rotor according to claim 1 or 2, characterized in that the rotor core further comprises:
the first rotor pressing plate is sleeved on the rotating shaft, a first dovetail groove is formed in one end, far away from the rotor punching sheet, of the first rotor pressing plate, a first balancing block is installed in the first dovetail groove, and the first rotor pressing plate is arranged corresponding to the first rotor end plate;
the second rotor pressing plate is sleeved on the rotating shaft, a second dovetail groove is formed in one end, away from the rotor punching sheet, of the second rotor pressing plate, a second balancing block is installed in the second dovetail groove, and the second rotor pressing plate and the second rotor end plate are arranged correspondingly;
the first rotor tooth pressing plate is provided with a first inner hole, and one end, close to the first rotor end plate, of the first rotor pressing plate is located in the first inner hole;
and the second rotor tooth pressing plate is provided with a second inner hole, and one end, close to the second rotor end plate, of the second rotor pressing plate is positioned in the second inner hole.
5. The electric machine rotor of claim 4,
the first rotor tooth pressing plate is pressed against the first rotor end plate, the center of the first rotor tooth pressing plate is provided with the first inner hole, the periphery of the first rotor tooth pressing plate is provided with a plurality of second tooth parts, and the second tooth parts are bent towards the first rotor end plate;
the position of the second tooth part when being installed corresponds to the first tooth part;
the second rotor tooth pressing plate is pressed against the second rotor end plate, the center of the second rotor tooth pressing plate is provided with a second inner hole, the periphery of the second rotor tooth pressing plate is provided with a plurality of third tooth parts, and the third tooth parts are bent towards the second rotor end plate;
the position of the third tooth portion at the time of mounting corresponds to the first tooth portion.
6. The electric machine rotor of claim 5, wherein the first rotor end plate and the first rotor pressure plate form a first gap therebetween, the first rotor tooth pressure plate is located within the first gap, and a thickness of the first rotor tooth pressure plate is greater than an axial gap value of the first gap;
and a second gap is formed between the second rotor end plate and the second rotor pressing plate, the second rotor tooth pressing plate is positioned in the second gap, and the thickness of the second rotor tooth pressing plate is greater than the axial gap value of the second gap.
7. The electric machine rotor of claim 6,
the plurality of second tooth parts are distributed at intervals and uniformly, and are annularly distributed on the periphery of the first rotor tooth pressing plate by taking the axis of the first inner hole as a central line;
the plurality of third tooth parts are distributed at intervals and uniformly, and the plurality of third tooth parts are annularly distributed on the periphery of the second rotor tooth pressing plate by taking the axis of the second inner hole as a central line.
8. The motor rotor as claimed in claim 4, wherein the conducting bar sequentially penetrates the first rotor tooth pressing plate, the first rotor end plate, the rotor punching plate, the second rotor end plate and the second rotor tooth pressing plate along the axial direction of the rotating shaft;
the first end of the conducting bar is inserted into a first slot at one end of the first end ring close to the rotor sheet, and the first end of the conducting bar is fixedly connected with the first slot;
and the second end of the guide bar is inserted into a second slot at one end of the second end ring close to the rotor punching sheet, and the second end of the guide bar is fixedly connected with the second slot.
9. The electric machine rotor as claimed in claim 8, wherein the bar guide has two first relief grooves on a side of the bar guide in a radial direction thereof close to the rotating shaft, wherein one of the first relief grooves corresponds to positions of the first rotor end plate and the first rotor tooth pressure plate, the other of the first relief grooves corresponds to positions of the second rotor end plate and the second rotor tooth pressure plate in an axial direction of the bar guide, an opening of the first relief groove faces the rotating shaft, and an extending direction of the first relief groove is parallel to the axis of the rotating shaft;
the guide bar is provided with two second unloading grooves on one side, far away from the rotating shaft, of the guide bar in the radial direction, wherein one of the second unloading grooves corresponds to the positions of the first rotor end plate and the first rotor tooth pressing plate, the other one of the second unloading grooves corresponds to the positions of the second rotor end plate and the second rotor tooth pressing plate, the opening of the second unloading groove deviates from the rotating shaft, and the extending direction of the second unloading groove is parallel to the axis of the rotating shaft.
10. An electric machine rotor as claimed in claim 9, wherein the top of the bar is depressed by mechanical pressing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010356980.4A CN111525719A (en) | 2020-04-29 | 2020-04-29 | Motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010356980.4A CN111525719A (en) | 2020-04-29 | 2020-04-29 | Motor rotor |
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| CN111525719A true CN111525719A (en) | 2020-08-11 |
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| CN202010356980.4A Pending CN111525719A (en) | 2020-04-29 | 2020-04-29 | Motor rotor |
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| WO2023118179A1 (en) * | 2021-12-21 | 2023-06-29 | Jheeco E-Drive Ag | Rotor for an electric machine, electric machine, and method for manufacturing a rotor for an electric machine |
| CN117713406A (en) * | 2024-02-06 | 2024-03-15 | 天蔚蓝电驱动科技(江苏)有限公司 | Iron core of squirrel-cage rotor and squirrel-cage rotor |
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Application publication date: 20200811 |
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